https://doi.org/10.1351/goldbook.T06472
In chronopotentiometry and related techniques, the time that elapses between the instant at which current is applied and the instant at which the concentration of an @[email protected] B at the electrode-solution @[email protected] becomes indistinguishable from zero. In experimental practice the latter time is often taken to be the instant at which the rate of variation of the potential of the @[email protected] attains a maximum value.